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Radio Emission from Active Galactic Nuclei

Published online by Cambridge University Press:  04 August 2017

K. I. Kellermann
K. I. Kellermann*
Affiliation:
National Radio Astronomy Observatory, Edgemont Road, Charlottesville, VA 22903, USA

Abstract

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Active Galactic Nuclei and quasars are characterized at radio wavelengths by a high surface brightness, a flat spectrum, variations in intensity on time scales of a few days to a few years, and by large internal motions which probably reflect Doppler beaming from a synchrotron source which is moving with relativistic velocity away from the central energy source and toward the observer. The observations do not support interpretations based on simple ballistic models where the observed motion and core strength depends only on the geometric orientation of a relativistic beam, but appear to require significant dispersion in intrinsic properties as well as complex dynamics.

Type
V. Jets, Superluminal Motions and Blazars
Information
Symposium - International Astronomical Union , Volume 121: Observational Evidences of Activity of Galaxies , 1987 , pp. 273 - 286
Copyright
Copyright © Reidel 1987 

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